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https://issues.apache.org/jira/browse/KAFKA-18829?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17929141#comment-17929141
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Gunnar Morling commented on KAFKA-18829:
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Thanks a lot for the fast fix! Can confirm this works now as expected as of
d31cbf59dee6a77c1c673db06900ecc238894ed7.
> Can't use explicit ack when poll returns an empty batch
> -------------------------------------------------------
>
> Key: KAFKA-18829
> URL: https://issues.apache.org/jira/browse/KAFKA-18829
> Project: Kafka
> Issue Type: Sub-task
> Reporter: Gunnar Morling
> Assignee: Shivsundar R
> Priority: Major
> Fix For: 4.0.0, 4.1.0
>
>
> I am getting the following exception when trying to acknowledge a message
> with a share consumer and poll returns an empty batch of messages:
>
> {code:java}
> Exception in thread "main" java.lang.IllegalStateException: Implicit
> acknowledgement of delivery is being used.
> at
> org.apache.kafka.clients.consumer.internals.ShareConsumerImpl.ensureExplicitAcknowledgement(ShareConsumerImpl.java:1053)
> at
> org.apache.kafka.clients.consumer.internals.ShareConsumerImpl.acknowledge(ShareConsumerImpl.java:681)
> at
> org.apache.kafka.clients.consumer.KafkaShareConsumer.acknowledge(KafkaShareConsumer.java:535)
> {code}
>
> This is as of commit 385b7ad3557196f8e84b34cc536f6dd2ac1fd502.
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